Apache failed to start - httpready

Problem :
While doing one of the below :

apachectl start

apachectl restart

/usr/local/etc/rc.d/apache start

/usr/local/etc/rc.d/apache restart

an error message appear

No such file or directory: Failed to enable the 'httpready' Accept Filter

Solution :
1. execute :

kldload accf_http

2. try to start apache again


3. if successful, then insert :

accf_http_load=”YES”

into /boot/loader.conf

Voila !!!